^ wow. watta computer geek. thanks so much for that info. it's finally clear to me. that's why they say having quad core / multi core chip is expensive. as what xavier and ate laine said, it's better to buy the latest laptop/desktop pc. since the pc's released now are fast upgrading. wahohohoh. sony vaio's are so eye-candy. huhu i can't afford it... i'll just reformat it.